BA 430 then KL 1619 at Schiphol
London Heathrow → Amsterdam → Milan Linate
Timetable, Amsterdam time
08:50BA 430 from London Heathrow at the gate
21:25KL 1619 to Milan Linate leaves the gate
12 h 35 apart on the timetable
KL 1619 leaves 12 h 35 after BA 430 arrives on the timetable: more than half a day, so not a connection we count.